merge revision(s) 44809,44811,44813,44815,44816,44817,44818,44918,45003: [Backport #9482]

	* ext/psych/yaml/emitter.c: merge libyaml 0.1.5

	* ext/psych/yaml/loader.c: ditto

	* ext/psych/yaml/parser.c: ditto

	* ext/psych/yaml/reader.c: ditto

	* ext/psych/yaml/scanner.c: ditto

	* ext/psych/yaml/writer.c: ditto

	* ext/psych/yaml/yaml_private.h: ditto

	* ext/psych/lib/psych.rb: New release of psych.

	* ext/psych/psych.gemspec: ditto


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@45160 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 30 insertions, 3 deletions

diff --git a/ext/psych/yaml/loader.c b/ext/psych/yaml/loader.c
index 9d3d912663..cb3ea93089 100644
--- a/ext/psych/yaml/loader.c
+++ b/ext/psych/yaml/loader.c
@@ -283,9 +283,12 @@ static int
 yaml_parser_load_scalar(yaml_parser_t *parser, yaml_event_t *first_event)
 {
     yaml_node_t node;
+    ptrdiff_t node_index;
     int index;
     yaml_char_t *tag = first_event->data.scalar.tag;
 
+    if (!STACK_LIMIT(parser, parser->document->nodes, INT_MAX-1)) goto error;
+
     if (!tag || strcmp((char *)tag, "!") == 0) {
         yaml_free(tag);
         tag = yaml_strdup((yaml_char_t *)YAML_DEFAULT_SCALAR_TAG);
@@ -298,7 +301,11 @@ yaml_parser_load_scalar(yaml_parser_t *parser, yaml_event_t *first_event)
 
     if (!PUSH(parser, parser->document->nodes, node)) goto error;
 
-    index = parser->document->nodes.top - parser->document->nodes.start;
+    node_index = parser->document->nodes.top - parser->document->nodes.start;
+#if PTRDIFF_MAX > INT_MAX
+    if (node_index > INT_MAX) goto error;
+#endif
+    index = (int)node_index;
 
     if (!yaml_parser_register_anchor(parser, index,
                 first_event->data.scalar.anchor)) return 0;
@@ -327,8 +334,11 @@ yaml_parser_load_sequence(yaml_parser_t *parser, yaml_event_t *first_event)
         yaml_node_item_t *top;
     } items = { NULL, NULL, NULL };
     int index, item_index;
+    ptrdiff_t node_index;
     yaml_char_t *tag = first_event->data.sequence_start.tag;
 
+    if (!STACK_LIMIT(parser, parser->document->nodes, INT_MAX-1)) goto error;
+
     if (!tag || strcmp((char *)tag, "!") == 0) {
         yaml_free(tag);
         tag = yaml_strdup((yaml_char_t *)YAML_DEFAULT_SEQUENCE_TAG);
@@ -343,7 +353,11 @@ yaml_parser_load_sequence(yaml_parser_t *parser, yaml_event_t *first_event)
 
     if (!PUSH(parser, parser->document->nodes, node)) goto error;
 
-    index = parser->document->nodes.top - parser->document->nodes.start;
+    node_index = parser->document->nodes.top - parser->document->nodes.start;
+#if PTRDIFF_MAX > INT_MAX
+    if (node_index > INT_MAX) goto error;
+#endif
+    index = (int)node_index;
 
     if (!yaml_parser_register_anchor(parser, index,
                 first_event->data.sequence_start.anchor)) return 0;
@@ -351,6 +365,9 @@ yaml_parser_load_sequence(yaml_parser_t *parser, yaml_event_t *first_event)
     if (!yaml_parser_parse(parser, &event)) return 0;
 
     while (event.type != YAML_SEQUENCE_END_EVENT) {
+        if (!STACK_LIMIT(parser,
+                    parser->document->nodes.start[index-1].data.sequence.items,
+                    INT_MAX-1)) return 0;
         item_index = yaml_parser_load_node(parser, &event);
         if (!item_index) return 0;
         if (!PUSH(parser,
@@ -384,9 +401,12 @@ yaml_parser_load_mapping(yaml_parser_t *parser, yaml_event_t *first_event)
         yaml_node_pair_t *top;
     } pairs = { NULL, NULL, NULL };
     int index;
+    ptrdiff_t node_index;
     yaml_node_pair_t pair;
     yaml_char_t *tag = first_event->data.mapping_start.tag;
 
+    if (!STACK_LIMIT(parser, parser->document->nodes, INT_MAX-1)) goto error;
+
     if (!tag || strcmp((char *)tag, "!") == 0) {
         yaml_free(tag);
         tag = yaml_strdup((yaml_char_t *)YAML_DEFAULT_MAPPING_TAG);
@@ -401,7 +421,11 @@ yaml_parser_load_mapping(yaml_parser_t *parser, yaml_event_t *first_event)
 
     if (!PUSH(parser, parser->document->nodes, node)) goto error;
 
-    index = parser->document->nodes.top - parser->document->nodes.start;
+    node_index = parser->document->nodes.top - parser->document->nodes.start;
+#if PTRDIFF_MAX > INT_MAX
+    if (node_index > INT_MAX) goto error;
+#endif
+    index = (int)node_index;
 
     if (!yaml_parser_register_anchor(parser, index,
                 first_event->data.mapping_start.anchor)) return 0;
@@ -409,6 +433,9 @@ yaml_parser_load_mapping(yaml_parser_t *parser, yaml_event_t *first_event)
     if (!yaml_parser_parse(parser, &event)) return 0;
 
     while (event.type != YAML_MAPPING_END_EVENT) {
+        if (!STACK_LIMIT(parser,
+                    parser->document->nodes.start[index-1].data.mapping.pairs,
+                    INT_MAX-1)) return 0;
         pair.key = yaml_parser_load_node(parser, &event);
         if (!pair.key) return 0;
         if (!yaml_parser_parse(parser, &event)) return 0;